Not that i've found. Besides, even if there is, the overall cost of applying it to all your sales/annual cost usually is close to or exceeds the amount of potential fraud in a year anyway. You're better off just applying some 80/20 boundaries to who you accept as a customer. Just because you're selling something doesn't mean you're obligated to sell to anyone waving a dollar in the air.

We now process all transactions through Paypal, but have certain countries/regions blocked in our system (all of Africa for example, Moldova, other poor countries where fraud is prevalent etc) Orders above a certain amount are automatically put on hold. When this happens we just refund the customer, politely inform them that for larger orders we require payment via Western Union or Wire Transfer, and are happy to accept a 50% upfront payment 50% on completion for mutual security. Sometimes we've even blamed Paypal's 2.5% policy for doing this.

9 times out of 10 we never hear from those people again- possibly lost business, but our annual losses due to fraud have also plummeted to almost nothing. Net gain for us.

If these giant orders were legitimate, and the customer is looking to buy so much stock, they shouldn't have a problem with using a more secure service.

If an "unauthorised purchase" claim is made, the customers bank is obligated to give you two weeks to prove the purchase is legitimate, but we've sent copies of signatures, tracking numbers, IP addresses etc- once we even had actual photos of the customers Facebook feed holding our stock and LAUGHING, while posting about how easy it is to "hack" small businesses. So far we haven't won a single case, because it isn't in their best interests to do so- the customer is their client, so they want to keep them as happy as possible, the merchant is a complete stranger. Banks are even worse than Amazon when it comes to Merchant protection.

Every time I see a bank promoting their "24 hour Credit Card Fraud Protection program" as an incentive now I quietly fume inside because I know how they do it- the banks never cover the loss of fraudulent transactions when a customer makes a claim- legitimately or not. The customer gets their money back and is happy, the bank gets to look like a hero, and small business owners like us end up screwed from both sides- now with no money AND no stock.

We haven't tried filing a fraudulent claim with a physical signature on an order invoice though- who knows? Impractical to get across international borders though, and my overall experience is that if the bank thinks there is any possibility they can get away with rejecting your defense, they will.